CVE-2017-12542
CRITICALCVE-2017-12542 is a critical-severity (CVSS 10) vulnerability in hp integrated lights-out 4 firmware. 11 public exploit references exist, so weaponization risk is real. O3 Security detects and blocks CVE-2017-12542 exploitation at runtime via eBPF exploit-chain detection and L7 egress monitoring, even on unpatched systems.
A authentication bypass and execution of code vulnerability in HPE Integrated Lights-out 4 (iLO 4) version prior to 2.53 was found.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2017-12542 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE sits: patch-first territory.
Where this sits among everything scored
Of 368,770 CVEs with a current EPSS score, this one falls in the ≥ 90% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Description
A authentication bypass and execution of code vulnerability in HPE Integrated Lights-out 4 (iLO 4) version prior to 2.53 was found.
Affected Products
integrated lights-out 4 firmwarehpResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
HPE iLO 4 < 2.53 - Add New Administrator User
by skelsec · Feb 5, 2018
Detection & mitigation playbook
Vendor / applianceDetect
Inventory every hp integrated lights-out 4 firmware deployment and check each version against the affected-products list above. Because the exploit targets the running system rather than your application code, also watch for exploitation at the network and runtime layer — O3 flags the exploit behaviour from runtime telemetry and egress traffic even before a vulnerable build is confirmed.
Fix
Apply the hp integrated lights-out 4 firmware security patch or hotfix for CVE-2017-12542 on the affected version, following the vendor advisory for your exact build.
Workarounds
Cut exposure now: restrict the management/admin interface to trusted networks, segment the device, and apply the vendor's recommended configuration mitigations and any WAF/IPS signature. O3's runtime protection blocks the exploit chain at execution, holding the line on unpatched or end-of-life systems until you can patch.
How O3 protects you
O3 detects and blocks CVE-2017-12542 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.
Tailored to CVE-2017-12542. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2017-12542 being exploited in your environment?
O3's eBPF runtime sensors and L7 egress monitoring detect and block the CVE-2017-12542 exploit chain at execution — protecting unpatched and end-of-life systems until the vendor patch is applied.